I fought vapor lock for well over a year on my Charger. Same thing, when it was cool, it would run all day but let it sit and heat soak or take it out on a hot day and it would run dry and wouldn't restart until it was cooled off.

I refused to go the electric pump route and deal with some of the hassles that can come along with that. I added the factory vapor separator canister with a hemi reproduction mech fuel pump.

I have run this car on freezing cold all the way up to one day at 103* in slow traffic with A/C running for 30 minutes and it didn't die on me.

New pump was $50 (my choice - wanted to replace) and the vapor separator was $50 or so. I got the SS pump lines for $30 and called it a day.

I still feel a little power loss when the motor gets really hot like idling after a while on a HOT day but that's from the carb getting hot and fuel boiling a bit in the bowls. I added a heat shield a spacer to the carb which helps a bit on that. Electric pump won't help there though.